Nice to see Atmel AVR there.
Yeah, I think it was right to include it, too.
For me, the AVR stands out as the one microcontroller family with datasheets that are correct and complete enough that you can program the device and its peripherals without having to consult multiple external sources, such as various errata pubs, or even better yet, rando websites where someone has figured out a chip erratum, but the mfr won't bother to update their datasheet, or where the chip is fine but the data sheet is wrong, but the code examples work, and so those become the relevant documentation, etc, etc.
AVR is blessedly free of most of that crap, which makes it a good and perhaps lucky choice to lead the maker charge.